Pine Valley, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 4.8 °C (low) to 22.6 °C (high). Annual precipitation averages 596.9 Millimeters. Pine Valley is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.2 °C | 16.1 °C | 116.33 mm |
| February | 0.6 °C | 15.2 °C | 137.41 mm |
| March | 1.1 °C | 18.2 °C | 92.46 mm |
| April | 1.7 °C | 18.4 °C | 39.12 mm |
| May | 3.9 °C | 22.6 °C | 19.56 mm |
| June | 6.8 °C | 28.1 °C | 2.79 mm |
| July | 11.8 °C | 32.3 °C | 7.87 mm |
| August | 12.4 °C | 33 °C | 12.45 mm |
| September | 9.6 °C | 29.4 °C | 11.43 mm |
| October | 5.6 °C | 23.7 °C | 21.34 mm |
| November | 2.4 °C | 19.6 °C | 46.23 mm |
| December | 0.6 °C | 15 °C | 89.92 mm |
| Annual | 4.8 °C | 22.6 °C | 596.91 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |